Interior of a Schnellboote shelter, Cherbourg

interiorofaschnellbootesheltercherbourg.jpg

This 70m long shelter housed up to four Schnellboote's (E-boats) and kept them safe from virtually all air attack.

This shelter lasted until the 1980's and was finally destroyed in order to make way for facilities relating to French nuclear submarines.

http://en.wikipedia.org/wiki/E-boat